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Marathon Calendar near Cardiff Bay 2025-2026

Explore the top marathons near Cardiff Bay for 2025-2026! We've gathered 22 exciting races in the area. Check out our detailed list below to find your next local race.

July 2026
Jul
25
Saturday

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
October 2026
Oct
18
Sunday

Phoenix Running - Aberfan

Backyard Ultra 5 km 10 km Half Marathon Marathon
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